AA 613 then UA 3916 at O'Hare
Washington National → Chicago → New Orleans
Timetable, Chicago time
09:16AA 613 from Washington National at the gate
07:00UA 3916 to New Orleans leaves the gate
21 h 44 apart on the timetable, overnight
UA 3916 leaves 21 h 44 after AA 613 arrives on the timetable: more than half a day, so not a connection we count.